男,65岁,大便频数,里急后重,便少量混有血黏液2个月,便常规见大量红细胞,偶见白细胞。宜采取哪种治疗方法()。 ["A.服水杨酸偶氮磺胺嘧啶","回肠造瘘","Miles手术","抗结核","Dixon手术"]
简述QT间期延长综合征。
影响X线量的因素是() ["靶物质的原子序数","高压电缆长度","X线管灯丝加热电流","管电压","自耦变压器"]
试述核素心肌显像检查方法。
于后前位胸片上可见到哪些正常软组织结构() ["胸大肌","女性乳腺及乳头","胸锁乳突肌","锁骨上皮肤皱褶","伴随阴影"]
试述冠心病患者进行非心脏手术时应注意的问题。